I came up with this for one of my other
concepts but it has merit on its own.
Baggers at grocery stores never get it
quite right. Some bags are too heavy,
others too light, and sometimes break
because they used the wrong kind of back.
How about putting a simple colored
sticker on each item
that symbolizes a
"bagging coefficient," and allows baggers
to more quickly and efficiently bag your
items. A red sticker means it always goes
on top. Green get's its own doubled bag,
light blue should go between purple and
yellow, etc.

The stickers would be assessed by
fragility, weight, value, and likeliness to
break a bag.

Now, bag packing is a passive thing and
can be done very quickly and very well. No
more wine explosions on the way up the
front porch!

Or you could be a grumpy old fart like me and put your items up onto the checkout conveyor in bag lots, with the heavy items closest to the operator and a 10 cm (count them, go on, ten of them) gap between each bag lot. Makes their job easier. Keeps you happy. All win win mate.